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Oil temps way high after header install
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Old 06-06-19, 04:22 AM   #101
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Default Re: Oil temps way high after header install

Quote:
Originally Posted by mheyman View Post
How? Difference? Yes. Obvious? Obviously not! Brapp would have figured this out long ago.

He wouldn’t be able to drive let alone idle more than a minute after startup if there was a coolant blockage.
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Old 06-06-19, 08:17 AM   #102
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Default Re: Oil temps way high after header install

Pretty sure I explained well enough for most people.
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Old 06-07-19, 09:50 PM   #103
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Default Re: Oil temps way high after header install

Quote:
Originally Posted by mheyman View Post
How? Difference? Yes. Obvious? Obviously not! Brapp would have figured this out long ago.

Cooling System Diagram in first post.
Updated Coolant Line Diagram (changed for many mods) - NASIOC

Oil Cooler is in a bypass in in the passenger side loop. But it's not the only path or the primary path. The only thing the thermostat controls is radiator flow. It has nothing to do with this.




Coolant changes little if at all from getting hot or even boiling.

We have symptoms - and a logical diagnosis. Shouldn't have taken us this long!
Removal and replacement of oil cooler results in hot oil. Oil cooler not working should have been the primary suspect right off the bat.
It's an interesting thought. I don't know enough about that system to comment, so it's definitely seeming like a good thing to investigate.

I tested the sensor tonight. Took boiling water, transferred it to a metal can, and within 1 minute had the sensor in it. The elevation at my house is 7700 ft and according to online sources, it seems like water should boil at about 196 degrees here. The submersed sensor read 190 degrees. I have to imagine the water lost a degree or two due to the thin metal can it was in as well. So to me that seems like a working sensor.
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Old 06-07-19, 09:54 PM   #104
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Default Re: Oil temps way high after header install

Quote:
Originally Posted by mheyman View Post
How? Difference? Yes. Obvious? Obviously not! Brapp would have figured this out long ago.

Cooling System Diagram in first post.
Updated Coolant Line Diagram (changed for many mods) - NASIOC

Oil Cooler is in a bypass in in the passenger side loop. But it's not the only path or the primary path. The only thing the thermostat controls is radiator flow. It has nothing to do with this.




Coolant changes little if at all from getting hot or even boiling.

We have symptoms - and a logical diagnosis. Shouldn't have taken us this long!
Removal and replacement of oil cooler results in hot oil. Oil cooler not working should have been the primary suspect right off the bat.
I don't know enough about the system to say one way or another... but it's an interesting thought. Would you think the cooler itself would be the issue or one of the hoses/connections going to it?

I tested the sensor tonight. Took boiling water, put it in an aluminum can, and within 90 seconds or so had the sensor in it and was reading off the gauge in the car. According to online sources, water at this elevation (7700 ft) boils at about 196 degrees. The sensor read the water temperature at 190 degrees. I'd also assume the can absorbed a small amount of heat. So it seems like the sensor is accurate within about 5 degrees.
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Old 06-08-19, 03:25 PM   #105
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Default Re: Oil temps way high after header install

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Old 06-08-19, 04:43 PM   #106
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Default Re: Oil temps way high after header install

So it seems right now that the only thoughts remaining from anyone (on here or otherwise) is the tune or the oil cooler.

I've reached out to my tuner to get his thoughts. Considering going for an aftermarket oil cooler kit that would replace the stock one. If that is the issue, it'll solve it as well. If not, it should at least let me keep things cool.

Last edited by brapp; 06-08-19 at 05:27 PM.
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Old 06-08-19, 07:06 PM   #107
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Default Re: Oil temps way high after header install

Unless something got into the cooler, it's the plumbing which is just a couple hoses.

When external coolers are installed in is normal to keep the stock one too? Then you need to fix it anyway, and it's not going to be difficult or very expensive.
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Old 06-09-19, 02:01 PM   #108
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Default Re: Oil temps way high after header install

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Originally Posted by mheyman View Post
Unless something got into the cooler, it's the plumbing which is just a couple hoses.

When external coolers are installed in is normal to keep the stock one too? Then you need to fix it anyway, and it's not going to be difficult or very expensive.
It still seems like if the hoses were blocked then the coolant system would be acting odd and getting hot as well. In fact the cooling system is working super well as even with 260 degree oil temps, water temps stayed normal.

But, good point about easy to swap. Probably worth just trying it.

And even if it isn't the hoses, I wonder if the cooler could have a blockage or have gotten less efficient somehow.

I believe when installing external oil coolers, it is normal to delete the stock one. And in my case, it would definitely be necessary as the extra height from the sandwich plate would otherwise push the oil filter into the headers.

One thought I got from a friend at autocross today was that perhaps the oil pump is struggling and is not pushing oil through the system as efficiently as it should. Thus leading to the oil getting hot.
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Old 06-09-19, 04:04 PM   #109
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Default Re: Oil temps way high after header install

Quote:
Originally Posted by brapp View Post
It still seems like if the hoses were blocked then the coolant system would be acting odd and getting hot as well. In fact the cooling system is working super well as even with 260 degree oil temps, water temps stayed normal.
NO!!! It's in a bypass dedicated to the cooler and only the cooler. You couod removed the cooler and block it off. I posted a link showing the routing. Once you realize it's in a bypass, and consider the size of the cooler. That bypass can not do cooling significant enough to affect the overall system. The plumbing is simply to small.


Quote:
Originally Posted by brapp View Post
And even if it isn't the hoses, I wonder if the cooler could have a blockage or have gotten less efficient somehow.

Yes, I'd be concerned about that. look in the ends. Blow it out with compressed air - in both directions.


Quote:
Originally Posted by brapp View Post
One thought I got from a friend at autocross today was that perhaps the oil pump is struggling and is not pushing oil through the system as efficiently as it should. Thus leading to the oil getting hot.

OK. That is a plausible explanation - no wait - wouldn't that cause low oil pressure?

But from a previous post:

Quote:
Originally Posted by mheyman View Post
Removal and replacement of oil cooler results in hot oil. Oil cooler not working should have been the primary suspect right off the bat.
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Last edited by mheyman; 06-09-19 at 04:10 PM.
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Old 06-09-19, 09:10 PM   #110
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Default Re: Oil temps way high after header install

Quote:
Originally Posted by mheyman View Post
NO!!! It's in a bypass dedicated to the cooler and only the cooler. You couod removed the cooler and block it off. I posted a link showing the routing. Once you realize it's in a bypass, and consider the size of the cooler. That bypass can not do cooling significant enough to affect the overall system. The plumbing is simply to small.
Hmm. I think I see what you mean. The diagram to me looked like the cooler was in the same route as the passenger side heads. But I'm not too good with reading diagrams for such things.

What do you think could actually be causing the restriction? I'm trying to think of what could cause a hose to not pass sufficient fluid without leaking or anything.


Quote:
Originally Posted by mheyman
OK. That is a plausible explanation - no wait - wouldn't that cause low oil pressure?
I would imagine it would. I don't have an oil pressure gauge so I can't be certain. Perhaps the pressure is low but not enough to cause other immediate issues so it is only being noticed by the high temps.
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